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Diffstat (limited to 'src/resolve/resolved-dns-packet.c')
-rw-r--r--src/resolve/resolved-dns-packet.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c
index fa0516f8a0..a9cc5ca6aa 100644
--- a/src/resolve/resolved-dns-packet.c
+++ b/src/resolve/resolved-dns-packet.c
@@ -32,10 +32,10 @@ int dns_packet_new(DnsPacket **ret, DnsProtocol protocol, size_t mtu) {
assert(ret);
- if (mtu <= 0)
+ if (mtu <= UDP_PACKET_HEADER_SIZE)
a = DNS_PACKET_SIZE_START;
else
- a = mtu;
+ a = mtu - UDP_PACKET_HEADER_SIZE;
if (a < DNS_PACKET_HEADER_SIZE)
a = DNS_PACKET_HEADER_SIZE;